Web Dynpro for ABAP(1):Web Dynpro结构
Web Dynpro for ABAP
1Web Dynpro结构
Web Dynpro Component:View,Web Dynpro Window,Controller。
Web Component可以嵌入其他Web Component
1.1View
每个Web Dynpro Application至少有一个View;
View中可以嵌入多种Element视图元素;
View拥有自己的Context,Controller。Context用来存储页面使用者看到和交互使用的数据。
View Set,多个View嵌入虚拟Layout
Plugs and Navigation Links
View之间跳转使用Plugs；
Plugs分为inbound and outbound plugs
1.2Web Dynpro Window
Window至少包含一个View;
View之间通过Navigation Link跳转；
Interface View
Window可以连结到Web Dynpro application，所以Window可以通过URL调用访问到。
1.3 Controller
Controllers are the active parts of a Web Dynpro application;
View Controller处理用户在View上的动作；
View Context包含View上的数据；
Web Dynpro Component Controller结构：
Interface Controller每个Web Dynpro Component只有一个；
Controller控制逻辑位置：Event Handler,Methods,Supply Functions;
Context: The data used in the component or in the view is stored in the context；
Context结构：
Context参数：Cardinality
|
Cardinality |
Meaning |
|
1:1 |
The node contains only one element instance, which is instantiated automatically. |
|
0:1 |
The node contains only one element instance, which must not be instantiated. |
|
1:n |
The node can contain multiple element instances, of which at least one must always be instantiated (and is instantiated automatically). |
|
0:n |
The node can contain multiple element instances, of which none have to be instantiated. |
Context参数：lead selection；
Context参数：Automatic/Manual Initialization；
Context参数：Singleton Property
Data Binding and Mapping
1.Component Controller的Context可以映射到View的Context;
2.Binding a UI Element to a Context Attribute;
Event
The component controller allows you to create events.
Inbound Plugs类似于Event;
Action
UI Element可以有自己Event;
1.4 Interfaces of Web Dynpro Components
1.5 Web Dynpro Application
2Web Dynpro Application Demo
Package:SWDP_DEMO_TUTORIALS